/* script by Ascaria */

function pozadi_podle_rozliseni()
  {
  document.getElementsByTagName('body')[0].style.backgroundImage = "none"; // neni tedy potreba noscript
  this.x = screen.width;
  this.y = screen.height;
  this.nacti = function(modul)
    {
    if(!modul) modul = 'index';
    var new_url = '/images/rozliseni/'+this.x+'x'+this.y+'_'+modul+'.jpg';
    var tester = new Image();
    tester.default_url = '/images/rozliseni/index.jpg';
    tester.new_url = new_url;
    tester.onerror = function(evt)
      {
      document.getElementsByTagName('body')[0].style.backgroundImage = "url('"+this.default_url+"')";
      //$('body').append('<div class="lberror">Pozadí nenalezeno: '+this.new_url+'</div>');
      };
    tester.onload = function(evt)
      {
      document.getElementsByTagName('body')[0].style.backgroundImage = "url('"+this.new_url+"')";
      //alert('image found: '+this.new_url);
      };
    tester.src = new_url;
    }
  }